Thursday, July 30, 2009

Uncertain levees and the aftermath of Hurricane Katrina

Matthew Cardinale in IPS: Today, the population of New Orleans is still about 175,000 people fewer than it was before Hurricane Katrina hit four years ago next month. Along with concerns about jobs and housing costs, the city's vulnerability to flooding has weighed heavily on the minds of many evacuees, many of whom have not returned.

In the first part of this series, IPS explained how the levees are being built up to a new standard of protection - essentially 99 percent protection each year - scheduled to be completed by the end of 2011, and that Holland, by comparison, uses a higher standard of 99.99 percent protection.

Unfortunately, most New Orleanians, both current residents and in the diaspora, have very little understanding of what level of protection is being promised. Neither the local nor national media have asked the tough questions, said Sandy Rosenthal, executive director of Levees.org.

People in New Orleans see work being done on the levees, but they generally sense that the level of protection being promised would not be strong enough to handle another hurricane on the scale of Katrina. The street wisdom is that the new levees might be strong enough for a Category 3 or 4 hurricane, but certainly not a 5.

In reality, the scale which measures hurricanes in categories 1 through 5, the Saffir-Simpson scale, speaks to intensity or wind speed, not to flood levels, the latter of which are more important to the issue of levee protection, several experts told IPS. Ed Link of the Interagency Performance Evaluation Task Force, which studied the Hurricane Katrina levee failures, said the scientific community is debating whether to create a new category system that is both meaningful and that people can understand. He declined to identify a category level which would describe the level of protection, using Saffir-Simpson, that would be offered by the new levees....

June 2009 – At the studios of Cleanskies TV, I was interviewed about the costs of climate change, and discussed adaptation efforts underway in the US and around the world.

May 2009 – I helped draft the scenarios for Rising Waters, a multistakeholder scenarios effort focused on climate change adaptation in the Hudson Valley. The final report is now completed and available here.

May 2008 – I reviewed two books on climate and energy in the New Leader magazine: James Gustave Speth's The Bridge at the Edge of the World: Capitalism, the Environment and Crossing from Crisis to Sustainability, plus Robert Bryce's Gusher of Lies: The Dangerous Delusions of Energy Independence.

January 2008 – A very local paper covers a very global issue.... The Litchfield County Times in northwestern Connectictut ran an article in January 2008 about Carbon-Based.

Now available: Climate Change Adaptation in 2011

A selection of my writings from 2011, plus some of my posts, as well as links... all focusing on the risks of climate change